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DPChallenge Forums >> Tips, Tricks, and Q&A >> How do you get rid of those lines?
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Showing posts 26 - 43 of 43, (reverse)
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 09/09/2005 11:30:06 AM · #26
Any possibilty you have your video display adaptor set to 16-bit color instead of 32-bit? (been down that road before).

Edit: Nevermind - missed it. Duh

Message edited by author 2005-09-09 12:01:25.
 09/09/2005 11:33:37 AM · #27
Originally posted by Louison:
Originally posted by legalbeagle:
They look to me like lines caused by an incomplete colour palette - what settings do you save files in and what programs do you use? From your examples, they appear to be most obvious in the greys.


My original is saved by simply clicking and dragging from the camera to my pc, using ACDSee 3.1. Could this be the problem?


Shouldn't be - the gradation is found in a gradual change of shade, and is part of the image (which may be more or less visible on different monitors, depending on their sensitivity at the relevant part of the spectrum). I think that it is visible because something is causing what should bea very gradual shift, in very small steps, to become a big step in one shift at different points. This is caused by the use of less than the full pallette of colours being used in the image.

The possible reason for the image containing less than the full palette being used are multiple.

Jpeg compression may be cutting out certain parts of the colour palette in order to save space. That could be a result of over compression by the camera (use its highest quality mode) or the paint software (save in native file formats, or jpegs at their highest (largest) quality setting.

The camera may be cutting out certain parts of the spectrum - check the settings are on finest, and see if using a different ISO has an impact.

The file may not be recording the full spectrum - if it is not recording full truecolour file information. Have not got time to look into fixing this.

Fixing it should be a matter of using the heal brush (or blur) in photoshop over the selected regions to create a better blended mode.
09/09/2005 11:52:37 AM · #28
I noticed those lines more when I use my 50mm 1.4 lens. frustrating isn't it.
 09/09/2005 11:59:26 AM · #29
I'm having a similar problem.. I took a random snap and these odd lines appeared.. what's wrong?!?!?

//koti.mbnet.fi/uuslehto/img/test/test.jpg
 09/09/2005 01:19:32 PM · #30
Originally posted by Uusilehto:
I'm having a similar problem.. I took a random snap and these odd lines appeared.. what's wrong?!?!?

//koti.mbnet.fi/uuslehto/img/test/test.jpg


:o)
 09/09/2005 01:22:53 PM · #31
Originally posted by kirbic:
I do see the lines in the second photo. What I think they are is an artifact from the sensor readout. It's similar to the notorious "Canon banding" on the 10D, which is most noticeable on higher ISO shots with smooth areas. It's caused by electrical noise issues.
I don't believe it's part of the actual image, they are slightly visible on the leaf as well, which means they are not a part of the BG. It's interesting that they show up on only part of the image. Do they always show up on just a part, the same part, different parts, or sometimes the whole image? Do they show up at certain settings, e.g. high ISO, slow shutter speed, or??


I know they don't always show on the same part of the image, but I'll have to check on the rest of these questions. Thanks.
 09/10/2005 12:26:47 AM · #32
This is a good example..see the lines at the lower part of the photo?

09/10/2005 10:02:03 AM · #33
Originally posted by Sonifo:
This is a good example..see the lines at the lower part of the photo?



Yes, that's what I mean. Do you know of an effective way to get rid of them?
 09/10/2005 10:06:53 AM · #34
Originally posted by Louison:
Here's another shot where the jaggy lines (yes, legalbeagle, those are what I mean) are more obvious. I just posted it to illustrate what I mean.



I can see the lines in that one. I thank all that is though is it's so dark that this moniter can't handel it and has to seperate it into "lines" to display the difference betwen darker darks and lighter darks.
 09/10/2005 10:53:36 AM · #35
Originally posted by Sonifo:
This is a good example..see the lines at the lower part of the photo?



This looks like a different problem than Louison's "If You Only Knew". this looks like a combination of JPEG artifact and posterization. It's pretty subtle. two things can be done to lessen the appearance of this effect:
- Use the largest file size you reasonably can, close to the 150kb limit.
- Introduce a very small amount of noise into the smooth areas, less than 0.5% usually works. You can also fade the noise after adding it to tweak the effect.
On Louison's shot, the lines are more defined, and also present on areas with some detail , like the leaf. That leads me to believe that they are an artifact of sensor readout, that is, their root cause is electronic noise.
The Canon cameras can show this latter effect as well, but usually it's only visible in deep shadows on high-ISO shots.

Message edited by author 2005-09-10 10:56:06.
 09/10/2005 02:25:24 PM · #36
Well guys, I finally noticed that on the Statue of Liberty photo, the lines I saw were actually from my monitor. Duh...

But that's not the case of the linden flower photo, of course. So I have 2 different cases of banding; one on screen and the other in the shot, which I still must find a way to get rid of.

:o)
 09/10/2005 02:29:22 PM · #37
Originally posted by kirbic:
Originally posted by Sonifo:
This is a good example..see the lines at the lower part of the photo?



This looks like a different problem than Louison's "If You Only Knew". this looks like a combination of JPEG artifact and posterization. It's pretty subtle. two things can be done to lessen the appearance of this effect:
- Use the largest file size you reasonably can, close to the 150kb limit.
- Introduce a very small amount of noise into the smooth areas, less than 0.5% usually works. You can also fade the noise after adding it to tweak the effect.
On Louison's shot, the lines are more defined, and also present on areas with some detail , like the leaf. That leads me to believe that they are an artifact of sensor readout, that is, their root cause is electronic noise.
The Canon cameras can show this latter effect as well, but usually it's only visible in deep shadows on high-ISO shots.


I do use the largest on my canon..I have never shot anything other than large. I just notice it when the focus is really shallow and you can see it is the same as hers. hrrrmmm...

And it only happens when I use my 50mm 1.4 lens at 2.8-1.4

Message edited by author 2005-09-10 14:31:55.
 09/10/2005 02:33:38 PM · #38
Originally posted by Louison:
Well guys, I finally noticed that on the Statue of Liberty photo, the lines I saw were actually from my monitor. Duh...

But that's not the case of the linden flower photo, of course. So I have 2 different cases of banding; one on screen and the other in the shot, which I still must find a way to get rid of.

:o)


Try an aperture of 2.8-5.6 and see what happens..I think it is the DOF that causes it.
 09/10/2005 02:36:47 PM · #39
Botox? :P
 09/11/2005 01:02:51 PM · #40
Originally posted by Sonifo:
Originally posted by Louison:
Well guys, I finally noticed that on the Statue of Liberty photo, the lines I saw were actually from my monitor. Duh...

But that's not the case of the linden flower photo, of course. So I have 2 different cases of banding; one on screen and the other in the shot, which I still must find a way to get rid of.

:o)


Try an aperture of 2.8-5.6 and see what happens..I think it is the DOF that causes it.


Thanks! I'll try that.
 09/11/2005 01:03:16 PM · #41
Originally posted by faidoi:
Botox? :P


:o) Good idea, I'll try that too!
 09/11/2005 01:13:42 PM · #42
I've seen those lines on my Sony when I attached my external batteries for too long of a time. The camera gets really hot and it's happen to a couple shots.
 09/11/2005 01:51:07 PM · #43
Originally posted by faidoi:
I've seen those lines on my Sony when I attached my external batteries for too long of a time. The camera gets really hot and it's happen to a couple shots.


Good to know. However, I don't have external batteries.
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